Even though he is not officially, legally her son he most certainly is and Sabine loves him. She also knows that one day he will be and not only in her heart. Sabine loves Adrien, her son, and is going to give him as much and all of the love and affection she can. She is going to make sure to make up for what he lacked for years.

When he attempts to call her Madame Dupain-Cheng, Sabine alternates between insisting that he use her name or call maman. He usually blushed and would stutter out a Sabine. Sometimes when she was really mothering him there would be an exasperated or very loving and happy "Maman…" slipping from his mouth. She always beams when it happens.

In the Dupain-Cheng household food is Very Important. It is one of the ways that you can show love without words but can convey so much meaning. Also, feeding your children comes naturally to a mother. And it is painfully obvious that Adrien does not get enough at home and he needs it a bit more than others. With her supplementary feeding Adrien gets a bit taller and bulks up and has a lot more energy – which seems to surprise him from time to time when he notices his increased stamina.

Sabine has her suspicions, though to be fair they are like 98% certainties at this point, about her daughter and Adrien and prepares food accordingly. Mari takes lunches for the two of them when they don't plan on coming back to the bakery. They each get enough food for about 2 people – Adrien gets more than Mari usually. The growing boy needs as much food as he can get – that model diet is not doing his health any favors.

There is always extra food following an akuma battle.

Adrien also gets to have whatever sweets he wants – something that Marinette is used to but is perpetually a surprise to the boy. Sometimes Sabine and Tom have something particular set aside, sometimes he has a craving, and sometimes he only has to look at something in one of the display cases for a couple seconds longer than normal and it is being handed to him before he even has time to blink.

Adrien spends a lot of nights at the bakery. Sabine knows he needs as much love and warmth and family as he can soak up. She and Tom trust the two teens and even encourage them sharing Mari's bed.

Sabine will sometimes tuck the two of them into bed – pulling up the blankets and kissing their foreheads. Adrien usually turns red and will hide most of his head under the blanket until she leaves. She usually gives him a second goodnight kiss in response.

Her son is adorable when he gets flustered.

And that is why it was Sabine's goal in life to fluster him as much as possible – with as much love, affection, and attention as she possibly can.

Sabine, Mari, Tom, and Nino plan a surprise birthday party for him. There is so much food – much of it being a particular blond's favorites – that a small military unit could wander into the apartment, eat their fill, and they would still have enough food for everyone to take home boxes of leftovers. Nino made a fantastic playlist full of songs that Adrien likes but makes sure that the music is not the main focus. That is celebrating Adrien's birthday and demonstrating just how many people care about him. When Adrien arrives at the party he hugs Sabine and Mari for at least 10 minutes because he is overwhelmed by the sheer amount of love this family gives him regularly, effortlessly and would rather not have everyone see him cry*.

Sabine leads the others in compliments and congratulations. They celebrate with a special dinner whenever he receives an award, wins a competition or something good happens to the young man. He always gets extra special treats when he does well on something – when he receives good grades on challenging projects. Sometimes those treats coincide with Chat Noir protecting Ladybug or taking a harsh hit. Sabine usually waves it off when questioned as not having a particular reason that time – "I just wanted to spoil my son a little, obviously."

Sabine loves telling Adrien how much she loves him, how much she cares for him, how much she trusts him – in making decisions for himself and with Marinette. Sabine often feels the need to push him to make decisions for himself, to help him realize that he is his own person, that he matters, that his opinions matter, that he has freedoms and rights. Which is sadly something he seemed to lack before he became part of the family. For a long time he was hesitant with Mari, especially - or maybe mostly - in front of them but she and Tom very, very happily endorsed, supported, and encouraged the relationship... in all aspects. She tells him as much as she can that he is her son and that she cannot wait until it is legally so, usually with a smirk and a raised eyebrow causing a blush to spread across his face and for him to splutter and rub the back of his neck (because he has definitely thought about it and has plans) in embarrassment.

One of the more satisfying things for Sabine is how Adrien has learned that he can also come to her for comfort when he has a bad day or after something happens – even or especially if it involves her daughter. She will hold him when he needs to cry, she will listen when he needs to vent – he has a family who loves him and that he can rely on that is more than just his girlfriend, he has parents who care about him and his wellbeing. And that is so very important.

*Direct quote from my chapter outline which was basically just paragraphs of all caps: HE IS AN EMOTIONAL KITTEN OKAY

also: BASICALLY SABINE IS #LETADRIENEAT2KFOREVER 24/7/365 (but seriously)

I have a bit of a head cannon that after the birthday party Sabine pulls Adrien aside before he joins Mari in her/their room and hands him a box of condoms with a ribbon on it, winks and then just walks away. He is very flustered and either he hides the box from Mari and refuses to talk about it or he tells her so they can be embarassed together but also then they can talk about the implications... and such.

SO hopefully you liked it - give me feedback and suggestions. Will probably do Tom and Adrien bonding next...